The computers built by PARC were: ALTO - this was a prototype microcode loadable machine with CDC disk pack attached. Generally credited to be the machine that was running the software that inspired the Mac and later windows (Charles went to work for Microsoft from PARC) ALTO II - Was Xeroxes attempt to manufacture the Alto as a product. (they weren't very successful) DANDELION - Officialy the Xerox 8010 Workstation. Which ran a set of applications called "Star" or "The Star Document Processing System" DORADO - ECL version of the "D-machine" architecture that was the machine that ran Smalltalk really quickly. Both the Alto and the Dandelion also ran XDE (called "tahoe") which was the "Xerox Development Environment" and it ran on top of an operating system called "Pilot". This first-hand from the Network Services Architect for the Office Systems Business Unit in Palo Alto, who also happens to be my wife of nearly 16 years.